NASA's 3D printed rocket parts cut time and cost (pictures)

This type of injector manufactured with traditional processes would take more than a year to make, but with these new processes it can be produced in less than four months, with a 70 percent reduction in cost.

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3D printed rocket injector prepped for hot fire test

NASA's rocket injectors manufactured with traditional processes would take more than a year to make, but with these new 3D printing processes, the parts can be produced in less than four months, with a 70 percent reduction in cost.

The 9.5-inch injector is about half the size of the injector for the RS-25 engine slated to power NASA's Space Launch System. It was made with just two pieces, whereas a similar injector made with traditional welding had 115 pieces.

3D printed rocket part blazes to life

A 3D printed rocket part roars to life during a hot fire test on August 22. The engine firing generated a record 20,000 pounds of thrust. The test was designed to explore how well large rocket engine components withstand temperatures up to 6,000 degrees Fahrenheit and extreme pressures, typical of a rocket engine environment.

3D printed rocket engine injector

It takes months to manufacture the same part using traditional welding methods. These images show an injector as it looked immediately after it was removed from the selected laser melting printer (left) and an injector after inspection and polishing (right).

3D printer bound for International Space Station

The first 3D printer bound for space passed a series of critical microgravity tests at NASA’s Johnson Space Center in Houston, Texas, in June.

Made in Space, the space manufacturing company, conducted examinations of its proprietary 3D printer technology during four microgravity flights that lasted two hours each and simulated conditions found on the ISS.

The printer, as part of the 3D Print Experiment in coordination with NASA, is scheduled to arrive at the International Space Station (ISS) in 2014.

70 percent reduction in cost

A Liquid oxygen/gaseous hydrogen rocket injector assembly built using 3D printing technology is hot fire tested at NASA Glenn Research Center’s Rocket Combustion Laboratory in Cleveland, Ohio, in June during earlier testing.

This type of injector manufactured with traditional processes would take more than a year to make, but with these new processes it can be produced in less than four months, with a 70 percent reduction in cost.

Made In Space laboratory

At the Made In Space laboratory, CTO Jason Dunn displays one of the 3D printer test experiments. Made in Space has additive manufacturing devices that are approved for use aboard the International Space Station.

Comparing performance

Propulsion engineer Sandra Greene (left) and test engineer Cynthia Sprader are seen here holding an injector during a series of test firings at NASA's Marshall Space Flight Center in Huntsville, Ala., in July.

The test allowed researchers to compare their performance to parts made the old-fashioned way with welds and multiple parts during planned subscale acoustic tests for the Space Launch System (SLS) heavy-lift rocket.

In little more than a month, Marshall engineers built two subscale injectors with a specialized 3D printing machine and completed 11 main-stage hot fire tests, accumulating 46 seconds of total firing time at temperatures nearing 6,000 degrees Fahrenheit while burning liquid oxygen and gaseous hydrogen.

CT scan of 3D printed part

Before testing the 3D printed rocket injector, materials engineers at NASA's Marshall Space Flight Center performed a computer tomography scan to ensure the part was fabricated according to the design.